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low 3.7

CVE-2019-14834 json

A vulnerability was found in dnsmasq before version 2.81, where the memory leak allows remote attackers to cause a denial of service (memor…

published 6y ago modified 4mo ago also EUVD-2019-5960

cvss
3.7
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

A vulnerability was found in dnsmasq before version 2.81, where the memory leak allows remote attackers to cause a denial of service (memory consumption) via vectors involving DHCP response creation.

Patch / fix

  • thekelleys dnsmasq 2.81
  • dnsmasq Debian 14, Debian 13, Debian 12 2.81-1

debian advisories DEBIAN-CVE-2019-14834

  • dnsmasq Ubuntu 16.04 LTS 2.75-1ubuntu0.16.04.7
  • dnsmasq Ubuntu 18.04 LTS 2.79-1ubuntu0.2
  • dnsmasq Ubuntu 20.04 LTS 2.80-1.1ubuntu1.2
  • dnsmasq Ubuntu Pro 14.04 LTS 2.68-1ubuntu0.2+esm3

ubuntu advisories UBUNTU-CVE-2019-14834

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • dnsmasq RHEL 7 2.76-16.el7
  • dnsmasq-utils RHEL 7 2.76-16.el7
  • dnsmasq RHEL 8 2.79-11.el8
  • dnsmasq-utils RHEL 8 2.79-11.el8

red hat advisories RHSA-2020:3878RHSA-2020:1715

  • dnsmasq SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +8 more 2.78-18.12.1
  • dnsmasq SLE Module for Basesystem 15 SP1 2.78-7.3.1
  • dnsmasq SLE Module for Basesystem 15 2.78-3.8.1
  • dnsmasq SLES 11 SP4-LTSS 2.78-0.17.15.1

suse advisories SUSE-SU-2021:14603-1SUSE-SU-2020:0419-1SUSE-SU-2019:3189-1SUSE-SU-2019:3188-1

  • dnsmasq openSUSE Tumbleweed 2.86-1.1
  • dnsmasq openSUSE Leap 15.1 2.78-lp151.5.3.1

opensuse advisories openSUSE-SU-2024:10721-1openSUSE-SU-2019:2669-1

  • dnsmasq Alpine 3.10, Alpine 3.9 2.80-r4
  • dnsmasq Alpine 3.24, Alpine 3.23, Alpine 3.22 +11 more 2.80-r5
  • dnsmasq Alpine 3.8 2.79-r4

alpine advisories ALPINE-CVE-2019-14834

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2019-14834 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-14834 updated cvss 3.7

dnsmasq: memory leak in the create_helper() function in /src/helper.c

  • Red Hat Enterprise Linux 5 dnsmasq Red Hat Enterprise Linux 6 dnsmasq, dnsmasq-utils
    affected: no fix planned “Out of support scope”
  • Red Hat OpenStack Platform 10 (Newton) dnsmasq-utils Red Hat OpenStack Platform 13 (Queens) dnsmasq-utils Red Hat OpenStack Platform 14 (Rocky) dnsmasq-utils
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) dnsmasq 2.79-11.el8, dnsmasq-utils 2.79-11.el8
    fixed: vendor fix RHSA-2020:1715
  • Red Hat Enterprise Linux Client (v. 7) dnsmasq 2.76-16.el7 Red Hat Enterprise Linux Client Optional (v. 7) dnsmasq-utils 2.76-16.el7 Red Hat Enterprise Linux ComputeNode (v. 7) dnsmasq 2.76-16.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) dnsmasq-utils 2.76-16.el7 Red Hat Enterprise Linux Server (v. 7) dnsmasq 2.76-16.el7 Red Hat Enterprise Linux Server Optional (v. 7) dnsmasq-utils 2.76-16.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) dnsmasq 2.76-16.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) dnsmasq-utils 2.76-16.el7
    fixed: vendor fix RHSA-2020:3878

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.65% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 3.7 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

  • The Dnsmasq Project dnsmasq

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.